img-fetcher.js

#!/usr/bin/env node

import fetch from 'node-fetch';
import cheerio from 'cheerio';

function parseHtml(url, callback) {
  fetch(url)
    .then(response => response.text())
    .then(html => cheerio.load(html))
    .then(callback)
    .catch(console.error)
  ;
}

// Main
if (process.argv.length !== 3) {
  console.log('Usage: npm run start http://example.com');
  process.exit();
}

parseHtml(process.argv[2], $ => {
  const srcList = [];
  $('img').each((i, element) => {
      srcList.push(img.src);
  });
  
  console.dir(srcList);
});